Comparison of bimodal and bilateral cochlear implant users
Comparison of bimodal and bilateral cochlear implant users
Background: many cochlear implant users have difficulty with speech perception in noise, music appreciation, tone of voice recognition, and talker identification. These tasks rely on pitch perception, which is generally poor in cochlear implant
users because of the speech processing algorithm. Amplitude envelope information is extracted from the incoming sound; the temporal fine structure, which is important for pitch perception, is mostly discarded. Bilateral cochlear implantation provides benefit in terms of localization and speech recognition in noise, but does not solve problems related to poor pitch discrimination. Benefit may also be obtained by using a hearing aid on the contralateral ear to the implant: bimodal hearing.
Methods: thirteen bimodal and thirteen bilateral cochlear implant users were
compared on speech recognition with a competing talker, music perception,
tone of voice recognition, and talker identification. In order to categorize the
extent of residual hearing required for bimodal benefit, a unique cochlear
implant subject with normal hearing in the contralateral ear was evaluated on
speech recognition with a competing talker.
Results: although the bimodal cochlear implant group performed better than the
bilateral group on most parts of the four pitch-related tests, the differences
were not statistically significant. Evaluation of the subject with normal
hearing in the contralateral ear showed that the addition of low-frequency
sound, even when unintelligible and limited to below 150 Hz, significantly
improved cochlear implant speech recognition with a competing talker.
Conclusion: this research adds to the existing studies that show no significant difference between bimodal and bilateral cochlear implant users.
Cullington, H.E.
a8b72e6d-2788-406d-aefe-d7f34ee6e10e
Zeng, F.G.
74397678-1910-4ebc-82dd-3f4d32c95019
14 May 2009
Cullington, H.E.
a8b72e6d-2788-406d-aefe-d7f34ee6e10e
Zeng, F.G.
74397678-1910-4ebc-82dd-3f4d32c95019
Cullington, H.E. and Zeng, F.G.
(2009)
Comparison of bimodal and bilateral cochlear implant users.
9th European Symposium on Paediatric Cochlear Implantation, , Warsaw, Poland.
14 - 17 May 2009.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Background: many cochlear implant users have difficulty with speech perception in noise, music appreciation, tone of voice recognition, and talker identification. These tasks rely on pitch perception, which is generally poor in cochlear implant
users because of the speech processing algorithm. Amplitude envelope information is extracted from the incoming sound; the temporal fine structure, which is important for pitch perception, is mostly discarded. Bilateral cochlear implantation provides benefit in terms of localization and speech recognition in noise, but does not solve problems related to poor pitch discrimination. Benefit may also be obtained by using a hearing aid on the contralateral ear to the implant: bimodal hearing.
Methods: thirteen bimodal and thirteen bilateral cochlear implant users were
compared on speech recognition with a competing talker, music perception,
tone of voice recognition, and talker identification. In order to categorize the
extent of residual hearing required for bimodal benefit, a unique cochlear
implant subject with normal hearing in the contralateral ear was evaluated on
speech recognition with a competing talker.
Results: although the bimodal cochlear implant group performed better than the
bilateral group on most parts of the four pitch-related tests, the differences
were not statistically significant. Evaluation of the subject with normal
hearing in the contralateral ear showed that the addition of low-frequency
sound, even when unintelligible and limited to below 150 Hz, significantly
improved cochlear implant speech recognition with a competing talker.
Conclusion: this research adds to the existing studies that show no significant difference between bimodal and bilateral cochlear implant users.
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Published date: 14 May 2009
Venue - Dates:
9th European Symposium on Paediatric Cochlear Implantation, , Warsaw, Poland, 2009-05-14 - 2009-05-17
Organisations:
Human Sciences Group
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Local EPrints ID: 71558
URI: http://eprints.soton.ac.uk/id/eprint/71558
PURE UUID: 1b7d0ebb-a080-48df-b8fd-2d2520eabcf5
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Date deposited: 11 Mar 2010
Last modified: 03 May 2024 01:40
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Author:
F.G. Zeng
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